Wrench



y 1959 G. H. JAMGOTCHIAN 2,895,362

WRENCH Filed Sept. 11, 1957 George H. Jamgafchian INVENTOR.

MW M1 2,895,362 Patented July 21, 1959 WRENCH George H. Jamgotchian,Fresno, Calif.

Application September 11, 1957, Serial No. 683,374

Claims. (C1. 81-90) This invention relates generally to a wrench, andmore specifically to a wrench for thread cutting nuts.

In many trades and industries, thread cutting nuts are used asfasteners; for instance, in the securing of name plates and medallionson automobiles. Therefore, the primary object of this invention is toprovide a new and improved type of wrench for thread cutting nuts.

Another object of this invention is to provide a wrench which isadaptable to accommodate the various types of handles, and also varioussize thread cutting nuts.

A further object of this invention is to produce a simple andinexpensive device and yet one which will be exceedingly elfective forthe purpose for which it is designed.

These together with other objects and advantages which will becomesubsequently apparent reside in the details of construction andoperation as more fully hereinafter described and claimed, referencebeing had to the accompanying drawings forming a part hereof, whereinlike numerals refer to like parts throughout, and in which:

Figure 1 is a perspective view of the wrench comprising the presentinvention, illustrating a thread cutting nut secured to the wrench, anda handle attached for turning this wrench;

Figure 2 is a perspective view of the nut engaging portion of thewrench;

Figure 3 is a perspective view illustrating a handle engaging portion ofthe wrench;

Figure 4 is a vertical sectional view taken through the wrench andillustrating its use in attaching a nut to an automobile medallion forexample; and

Figure 5 is a perspective view of a thread cutting nut for which thewrench was adapted for use.

Referring now more specifically to the drawings, the numeral generallydesignates the wrench comprising the present invention. In Figure 1, itcan be seen that a thread cutting nut 12 is engaged by this wrench, anda wrench handle 14 engages this Wrench.

The wrench 10 comprises a cylindrical body portion 16 having a centrallongitudinally extending bore therethrough, this bore having a polygonalshaped lower section 18, and a circular upper portion 20. A counterbore22 is formed at the upper portion of lower section 18.

The upper portion of the wrench 10 has two pairs of U-- shaped slots orgrooves 24 and 26 formed on the upper surface thereof. It will benoticed that the slots 24 are formed deeper than slots 26, so as toaccommodate a smaller thread cutting nut. Thus, the particular wrenchillustrated in Figure 2 is adapted to accommodate two size threadcutting nuts. However, it will of course be realized, that thesewrenches may be designed to accommodate a great number of different sizethread cutting nuts.

Thread cutting nut 12 generally comprises a flat circular portion 28having upstanding flanges 30 diametrically spaced about the peripheraledge of portion 28. Downwardly depending pointed sections 32 extenddownwardly from the peripheral edge of flat portion 28 at a pointadjacent flanges 30. An offset slot 34 is formed United States PatentOfiice centrally inthread cutting nut 12, and this slot has extendinginwardly about the edges thereof, thread cutting points 36, which act tocut threads onto a rod, when thread cutting nut 12 is rotated thereon.

As can be seen in Figure 1, a handle 14 is attached to wrench 10. Thishandle 14 generally consists of a centrally disposed shaft 38, having anextension 40 of crosssection so as to adapt itself for insertion intobore 18, extending from the outer end of shaft 38 thereof. The ratchetmechanism 42, of the type well-known in the art, is attached at theother end of shaft 38, and another shaft 44 extends outwardly therefrom.A hand-engaging portion 46 extends transversely of shaft 44 so as tomore easily adapt handle proper 14 for turning.

In use, the thread cutting nut 12 would be secured onto the wrench, bysnapping flanges 30 into one set of slots, either 24 or 26 depending onthe size. Then, as may be seen in Fig. 4, by means of wrench 10, the nut12 may be threaded onto projecting stud 48, and as the wrench turns thethread cutting nut, threads 50 are cut into stud 48, by. the sharppoints 36. In this manner, the name plate 52 may be secured to support54.

From the preceding description it will be seen that I have invented anew, novel and improved type of wrench for thread cutting, which lendsitself to easily and quickly fasten a thread cutting nut onto aprojecting stud, so as to cut threads, and then lock itself thereon.

The foregoing is considered as illustrative only of the principles ofthe invention. Further, since numerous modifications and changes willreadily occur to those skilled in the art, it is not desired to limitthe invention to the exact construction and operation shown anddescribed, and accordingly all suitable modifications and equivalentsmay be resorted to, falling within the scope of the invention asclaimed.

What is claimed as new is as follows:

1. A wrench for use particularly with thread cutting nuts of the typeformed of a circular plate having a central opening formed therein withdiametrically opposed inwardly and upwardly extending points projectinginto the opening for cutting threads on rods disposed through theopening and having diametrically opposed upwardly extending flangesattached to the plate, said wrench comprising a cylindrical body havinga nut engaging portion and a handle engaging portion and an axial boreformed therethrough, a wrench handle having a polygonal end, thatportion of said bore disposed in the not engaging portion of said bodybeing circular in configuration and of suflicient diameter to permit thepassage thereinto of a rod onto which the nut is to be fastened, thatportion of said bore disposed in the handle engaging portion of saidbody being polygonal in configuration and of sulficient dimensions toaccommodate said handle end without permitting relative rotationtherebetween, said nut engaging portion having diametrically opposedgrooves in the outer end thereof the inner surfaces of which are spacedapart a distance substantially equal to the distance between the flangeson the thread cutting nut for frictional engagement with said flanges,said circular bore portion being countersunk at the outer end thereof toprovide clearance for the nut points upon engagement of said nut on saidwrench.

2. In a wrench for use particularly with fasteners of the type formed ofa circular plate having a central opening formed therein and opposedupwardly extending flanges attached to the plate, said wrench comprisinga body having a bore formed in one end thereof, said bore being ofsufficient dimensions to accommodate for relative rotation therein a rodto which the fastener is to be connected, 2. pair of opposed groovesdisposed in said one end of the body and having the inner surfacesthereof spaced'aparta suflicient distance for permitting the flanges tobe frictionally engaged therein, whereby movement of said fastener isobtained by moving the wrench in the desired*directionfwith thefasterierengaged therewith.

j BkIn aWrench'fOr use particularly with fastenersof the type formedof'a' circular plate having'a central opening formed therein and"opposed upwardly extending flan gesattachedto'the plate, said wrenchcomprising a body having a'bore formed in one end thereof, said borebeing of sufiicient dimensions to accommodate for rela- 'tive rotationtherein a rod to which the fastener is to be desired direction, with thefastener engaged therewith,

another-pairof opposed grooves disposed in said one end *of' the bodyandangularly spaced from said first named --gmoves, the distance betweenthe-inner surfaces of said other grooves being different than thecorresponding distance of said first named grooves so that fastenershaving different flange spacing may be accommodated.

4. Ina wrench for use'particularly with fasteners of the type formed ofa circular plate having a central opening formed therein and opposedupwardly extending flanges attached to'the plate, said wrench comprisinga body having a bore formed in one end thereof, said bore being ofsufficient dimensions to-accommodate for relative rotation'therein a rodto Which'the fastener is to be connected, a pair of opposed groovesdisposed in said one'end of the body and having the inner surfacesthereof *spaced apart a sufiicient distance for permitting the flangesto'be' frictionally engaged therein, whereby movement of s'aid fasteneris'obtained by moving the Wrench in the *desired direction, with thefastener engaged therewith, another pair of opposedgrooves disposed insaid one'end of the body and angularly spaced from said first'namedgrooves, the distance between the inner surface of said other groovesbeing-different than'the corresponding dis- 4 tance of said first namedgrooves so that fasteners having different flange spacing may beaccommodated, a handle connected to said body for making movement ofsaid Wrench easier.

5. A wrench for use particularly with thread cutting nuts of the typeformed of a circular plate having a central opening formed therein withdiametrically opposed inwardly and upwardly extending points projectinginto the opening for cutting threads on rods disposed through theopening and having diametrically opposed upwardly extending flangesattached to the plate, said wrench comprising a cylindrical body havinga nut'en'gagingportion and a handle engaging portion and an'axial boreformed therethrough, a wrench handle having a polygonal end, thatportion of said bore disposed in the nut engaging portion of said bodybeing circular in configuration and of suflicient diameter to permit thepassage thereinto of -a rod onto which the nut is to be fastened, andthe nut points upon engagement of said nut on said wrench, that portionof said bore disposed in the handle engaging portion of said body "beingpolygonal in configuration and of sufficient dimensions to accommodatesaid handle end without permitting'relative rotation therebetween, saidnut enga ing vportionhaving diametrically opposed grooves in the outerend thereof the inner surfaces of which arelspaced apart a distancesubstantially equal to the distance between the fianges of the threadedcuttingnut'for 'fi'ictional engagement with said'flanges.

References'Cited'in the file of this patent UNITED STATES PATENTS1,447,564 Norland et a1. Mar.-6, 1923 2,434,660 Knight Jan. 20, 1948FOREIGN PATENTS 10,139 Great Britain 'Aug. 4, 1894 OTHER REFERENCES Jo.Mfg. 00., Catalog No. 1028, filed in Division 2 9 since June 24, 1946.

